| Name |
| |
| EXT_texture_type_2_10_10_10_REV |
| |
| Name Strings |
| |
| GL_EXT_texture_type_2_10_10_10_REV |
| |
| Contributors |
| |
| Daniel Ginsburg |
| Gary King |
| Petri Kero |
| I-Gene Leong |
| Tom McReynolds |
| Aaftab Munshi |
| Maurice Ribble |
| |
| Contact |
| |
| Benj Lipchak (benj.lipchak 'at' amd.com) |
| |
| Status |
| |
| Complete. |
| |
| Version |
| |
| Last Modified Date: January 18, 2008 |
| Revision: #6 |
| |
| Number |
| |
| 42 |
| |
| Dependencies |
| |
| This extension is written against the OpenGL ES 2.0 specification. |
| OES_texture_3D affects the definition of this extension. |
| |
| Overview |
| |
| This extension adds a new texture data type, unsigned 2.10.10.10 ABGR, |
| which can be used with RGB or RGBA formats. |
| |
| Issues |
| |
| 1. Should textures specified with this type be renderable? |
| |
| UNRESOLVED: No. A separate extension could provide this functionality. |
| |
| New Procedures and Functions |
| |
| None |
| |
| New Tokens |
| |
| Accepted by the <type> parameter of TexImage2D and TexImage3D: |
| |
| UNSIGNED_INT_2_10_10_10_REV_EXT 0x8368 |
| |
| Additions to Chapter 2 of the OpenGL ES 2.0 Specification (OpenGL Operation) |
| |
| Add a new section 2.8.1 - Unsigned integer 2.10.10.10 texture data formats |
| |
| UNSIGNED_INT_2_10_10_10_REV_EXT texture data format describes a 4-component |
| unsigned (2, 10, 10, 10) format laid out in a 32-bit word as shown. |
| |
| 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 |
| ------------------------------------------------------------------------------------- |
| | a | b | g | r | |
| ------------------------------------------------------------------------------------- |
| |
| This type may be used with RGBA or RGB formats. When used with RGB |
| format, the alpha channel assumes the value 1.0 when expanded, so the |
| 2-bit component in the 2.10.10.10 texture data is ignored in this case. |
| |
| Modifications to table 2.9 (Component conversions) |
| |
| Add the following entries: |
| |
| GLType Conversion of (r, g, b) Conversion of a |
| =============================== ======================= =============== |
| UNSIGNED_INT_2_10_10_10_REV_EXT c / (2^10 - 1) c / (2^2 - 1) |
| |
| Additions to Chapter 3 of the OpenGL ES 2.0 Specification (Rasterization) |
| |
| Modifications to table 3.1 (Texture Image Formats and Types) |
| |
| Add the following entries: |
| |
| Internal External |
| Format Format Type Bytes per Pixel |
| ======== ======== =============================== =============== |
| RGBA RGBA UNSIGNED_INT_2_10_10_10_REV_EXT 4 |
| RGB RGB UNSIGNED_INT_2_10_10_10_REV_EXT 4 |
| |
| Modifications to table 3.2 (Image Types) |
| |
| Add the following entries: |
| |
| UNSIGNED_INT_2_10_10_10_REV_EXT |
| |
| Interactions with OES_texture_3D |
| |
| If OES_texture_3D is not available, references to 3D textures should be |
| omitted. |
| |
| Errors |
| |
| None |
| |
| New State |
| |
| None |
| |
| Revision History |
| |
| #06 01/17/2008 Benj Lipchak Get rid of 10_10_10 format, make |
| 2_10_10_10_REV work with RGBA or RGB. |
| #05 01/15/2008 Benj Lipchak Renamed extension with _REV on the end. |
| #04 01/10/2008 Benj Lipchak UNSIGNED_INT_2_10_10_10_REV_EXT is new |
| token name, swith to 2.10.10.10 ABGR |
| instead of ARGB. |
| #03 01/03/2008 Benj Lipchak Change to multi-vendor EXT extension, |
| change to 2.10.10.10 ARGB format, |
| assigned fresh new token enums. |
| #02 11/19/2007 Benj Lipchak Switch to using AMD suffix for tokens. |
| #01 11/04/2007 Benj Lipchak Created from OES_data_type_10_10_10_2. |
| |
